ruyiZheng opened a new pull request, #3484:
URL: https://github.com/apache/hive/pull/3484
### What changes were proposed in this pull request?
<!--
add the MetadataSummary to hivemetatool so that the metatool can get the
summary of HMS, including JSON format and console format.
-->
### Why are the changes needed?
<!--
Hive Metastore currently lacks visibility into its metadata. This work
includes enhancing the Hive Metatool to include an option(JSON, CONSOLE) to
print a summary (catalog name, database name, table name, partition column
count, number of rows. table type, file type, compression type, total data
size, etc).
-->
### Does this PR introduce _any_ user-facing change?
<!--
Console output of HMS summary, JSON output of HMS summary(under /tmp/).
-->
### How was this patch tested?
<!--
Have used a nightly cluster to test. Waiting to test with the larger
database which is being created.
-->
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